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https://issues.apache.org/jira/browse/KAFKA-6460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16757803#comment-16757803
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Yishun Guan commented on KAFKA-6460:
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Hi [~guozhang] , I still not quite understand - so we should implement
_StoreTestDriver_ class that will be providing _MockStoreSupplier_ and
_MockStoreBuilder_ classes_?_ Or StoreSupplier and StoreBuilder doesn't have to
be mock, but this _StoreTestDriver_ will contain these two as variables and
wrap around those __ and provide auxiliary methods (like createKeyValueStore or
getSizeOfStore) for testing purpose_?_ Is a KIP needed? thanks
> Add mocks for state stores used in Streams unit testing
> -------------------------------------------------------
>
> Key: KAFKA-6460
> URL: https://issues.apache.org/jira/browse/KAFKA-6460
> Project: Kafka
> Issue Type: Improvement
> Components: streams, unit tests
> Reporter: Guozhang Wang
> Assignee: Yishun Guan
> Priority: Major
> Labels: newbie++
>
> We'd like to use mocks for different types of state stores: kv, window,
> session that can be used to record the number of expected put / get calls
> used in the DSL operator unit testing. This involves implementing the two
> interfaces {{StoreSupplier}} and {{StoreBuilder}} that can return a object
> created from, say, EasyMock, and the object can then be set up with the
> expected calls.
> In addition, we should also add a mock record collector which can be returned
> from the mock processor context so that with logging enabled store, users can
> also validate if the changes have been forwarded to the changelog as well.
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